JoAnn Lewis is patient number 17, one of 30 enrollees in a FDA approved Phase II clinical trial to evaluate the safety and utility of the Argus II Retina Implant (Retinal Stimulation System) in providing visual function to blind subjects with severe to profound retinitis pigmentosa. Max Aguilera-Hellweg, Director, Dp/Cameraman, Editor. Made on Assignment for National Geographic Magazine.